content/glyph/book/macros/macros_core.html
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<h2>Core Macros</h2>
<hr />
<div id="content-body">
<div class="navigation"><a href="/glyph/book/ref_commands.html">Command Reference ←</a><a href="/glyph/book/index.html">Contents</a><a href="/glyph/book/macros/macros_block.html">→ Block Macros</a></div>
<div class="section">
<h4 id="m_alias">alias</h4>
<p>Creates a macro alias.</p>
<p><strong>Example:</strong> <code>alias[s|section]</code></p>
<div class="section">
<h5 id="h_124">Parameters</h5>
<table style="width:100%;">
<tr>
<th style="width:30%">Parameter</th>
<th>Description</th>
</tr>
<tr>
<td>0</td>
<td>The name of the alias.</td>
</tr>
<tr>
<td>1</td>
<td>The name of an existing macro.</td>
</tr>
</table>
</div>
</div>
<div class="section">
<h4 id="m_and">and</h4>
<p>Conditional <code>and</code> operator, to be used with the <a href="#m_condition"><code>condition</code></a> macro.</p>
<p><strong>Example:</strong> <code>?[and[true|false]|This is never displayed.]</code></p>
<div class="section">
<h5 id="h_126">Parameters</h5>
<table style="width:100%;">
<tr>
<th style="width:30%">Parameter</th>
<th>Description</th>
</tr>
<tr>
<td>0</td>
<td>The first expression to test</td>
</tr>
<tr>
<td>1</td>
<td>The second expression to test</td>
</tr>
</table>
</div>
</div>
<div class="section">
<h4 id="m_comment">comment</h4>
<p>Evaluates to nothing. Used to add comments in a Glyph document that will not be displayed in output files.</p>
<strong>Aliases:</strong> <code>--</code>
<p><strong>Example:</strong> <code>--[=>[#link|This link will not be evaluated]]</code></p>
<div class="section">
<h5 id="h_128">Parameters</h5>
<table style="width:100%;">
<tr>
<th style="width:30%">Parameter</th>
<th>Description</th>
</tr>
<tr>
<td>0</td>
<td>The contents to comment out</td>
</tr>
</table>
</div>
<div class="section">
<h5 id="h_129">Remarks</h5>
<p>Macros are not expanded within comments.</p>
</div>
</div>
<div class="section">
<h4 id="m_condition">condition</h4>
<p>Tests a conditional expression. For more information, see <a href="/glyph/book/text_editing/conditionals.html#cond_macros">Conditional Macros</a>.</p>
<strong>Aliases:</strong> <code>?</code>
<div class="section">
<h5 id="h_131">Parameters</h5>
<table style="width:100%;">
<tr>
<th style="width:30%">Parameter</th>
<th>Description</th>
</tr>
<tr>
<td>0</td>
<td>The condition to test</td>
</tr>
<tr>
<td>1</td>
<td>The contents to expand if the condition is satisfied.</td>
</tr>
</table>
</div>
<div class="section">
<h5 id="h_132">Remarks</h5>
<p>For examples see any of the following:</p>
<ul>
<li><a href="#m_and"><code>and</code></a> macro</li>
<li><a href="#m_or"><code>or</code></a> macro</li>
<li><a href="#m_not"><code>not</code></a> macro</li>
<li><a href="#m_match"><code>match</code></a> macro</li>
<li><a href="#m_eq"><code>eq</code></a> macro</li>
</ul>
</div>
</div>
<div class="section">
<h4 id="m_config">config</h4>
<p>Returns the value of a configuration setting.</p>
<strong>Aliases:</strong> <code>$</code>
<p><strong>Example:</strong> <code>$[document.author]</code></p>
<div class="section">
<h5 id="h_134">Parameters</h5>
<table style="width:100%;">
<tr>
<th style="width:30%">Parameter</th>
<th>Description</th>
</tr>
<tr>
<td>0</td>
<td>The full name of a configuration setting.</td>
</tr>
</table>
</div>
</div>
<div class="section">
<h4 id="m_config_">config:</h4>
<p>Sets the value of a configuration setting.</p>
<strong>Aliases:</strong> <code>$:</code>
<p><strong>Example:</strong> <code>$:[document.draft|true]</code></p>
<div class="section">
<h5 id="h_136">Parameters</h5>
<table style="width:100%;">
<tr>
<th style="width:30%">Parameter</th>
<th>Description</th>
</tr>
<tr>
<td>0</td>
<td>The full name of a configuration setting.</td>
</tr>
<tr>
<td>0</td>
<td>The new value of the configuration setting</td>
</tr>
</table>
</div>
<div class="section">
<h5 id="h_137">Remarks</h5>
<p>This macro cannot be used in <a href="/glyph/book/compiling/programmatic_usage.html#modes">safe mode</a>.</p>
</div>
</div>
<div class="section">
<h4 id="m_eq">eq</h4>
<p>Conditional equality operator, to be used with the <a href="#m_condition"><code>condition</code></a> macro.</p>
<p><strong>Example:</strong> <code>?[eq[$[document.draft]|true]|This is displayed only in draft documents.]</code></p>
<div class="section">
<h5 id="h_139">Parameters</h5>
<table style="width:100%;">
<tr>
<th style="width:30%">Parameter</th>
<th>Description</th>
</tr>
<tr>
<td>0</td>
<td>The first expression to test</td>
</tr>
<tr>
<td>1</td>
<td>The second expression to test</td>
</tr>
</table>
</div>
</div>
<div class="section">
<h4 id="m_escape">escape</h4>
<p>Evaluates to its value. Commonly used with the escaping delimiters <code>[=</code> and <code>=]</code>.</p>
<strong>Aliases:</strong> <code>.</code>
<p><strong>Example:</strong> <code>.[=Macros are escaped here =>[#test].=]</code></p>
<div class="section">
<h5 id="h_141">Parameters</h5>
<table style="width:100%;">
<tr>
<th style="width:30%">Parameter</th>
<th>Description</th>
</tr>
<tr>
<td>0</td>
<td>The contents to escape.</td>
</tr>
</table>
</div>
</div>
<div class="section">
<h4 id="m_include">include</h4>
<p>Evaluates to the contents of a text file stored in the <code>text/</code> directory referenced by its relative path. If the <a href="/glyph/book/config/options.html#s_options_filters_by_file_extension"><code>options.filters_by_file_extension</code></a> setting is <code>true</code>, filters the contents of the file using the <a href="/glyph/book/macros/macros_filters.html#f_macros">filter macro</a> corresponding to the file extension.</p>
<strong>Aliases:</strong> <code>@</code>
<p><strong>Example:</strong> <code>include[frontmatter/introduction]</code></p>
<div class="section">
<h5 id="h_143">Parameters</h5>
<table style="width:100%;">
<tr>
<th style="width:30%">Parameter</th>
<th>Description</th>
</tr>
<tr>
<td>0</td>
<td>The file to include.</td>
</tr>
</table>
</div>
<div class="section">
<h5 id="h_144">Remarks</h5>
<ul><li>This macro cannot be used in <a href="/glyph/book/compiling/programmatic_usage.html#modes">safe mode</a>.</li>
<li><code>.glyph</code> is assumed if no file extension is specified.</li>
<li>This macro can also be used to include <code>.rb</code> ruby files within the <code>lib</code> directory. File contents are evaluated in the context of the <a href="http://yardoc.org/docs/h3rald-glyph/Glyph">Glyph</a> module.</li></ul>
</div>
</div>
<div class="section">
<h4 id="m_match">match</h4>
<p>Checks a string against a regular expression.</p>
<p><strong>Example:</strong> <code>?[match[Hello!|/^hell/i]|This is always displayed]</code></p>
<div class="section">
<h5 id="h_146">Parameters</h5>
<table style="width:100%;">
<tr>
<th style="width:30%">Parameter</th>
<th>Description</th>
</tr>
<tr>
<td>0</td>
<td>The string to check.</td>
</tr>
<tr>
<td>1</td>
<td>The regular expression to match against the string.</td>
</tr>
<tr>
<td>2</td>
<td>The contents to expand if the string matches.</td>
</tr>
</table>
</div>
<div class="section">
<h5 id="h_147">Remarks</h5>
<p>This macro must be used with the <a href="#m_condition"><code>condition</code></a> macro.</p>
</div>
</div>
<div class="section">
<h4 id="m_macro_">macro:</h4>
<p>Defines a macro.</p>
<strong>Aliases:</strong> <code>%:</code>
<p><strong>Example:</strong> <code>%:[test|"<em>test: #{value}</em>"]</code></p>
<div class="section">
<h5 id="h_149">Parameters</h5>
<table style="width:100%;">
<tr>
<th style="width:30%">Parameter</th>
<th>Description</th>
</tr>
<tr>
<td>0</td>
<td>The name of the new macro.</td>
</tr>
<tr>
<td>1</td>
<td>The macro definition (Ruby code).</td>
</tr>
</table>
</div>
<div class="section">
<h5 id="h_150">Remarks</h5>
<ul><li>This macro cannot be used in <a href="/glyph/book/compiling/programmatic_usage.html#modes">safe mode</a>.</li>
<li>The new macro can only be used <em>after</em> its declaration.</li></ul>
</div>
</div>
<div class="section">
<h4 id="m_not">not</h4>
<p>Conditional <code>not</code> operator, to be used with the <a href="#m_condition"><code>condition</code></a> macro.</p>
<p><strong>Example:</strong> <code>?[not[false]|This is always displayed.]</code></p>
<div class="section">
<h5 id="h_152">Parameters</h5>
<table style="width:100%;">
<tr>
<th style="width:30%">Parameter</th>
<th>Description</th>
</tr>
<tr>
<td>0</td>
<td>The expression to negate</td>
</tr>
</table>
</div>
</div>
<div class="section">
<h4 id="m_or">or</h4>
<p>Conditional <code>or</code> operator, to be used with the <a href="#m_condition"><code>condition</code></a> macro.</p>
<p><strong>Example:</strong> <code>?[or[true|false]|This is always displayed.]</code></p>
<div class="section">
<h5 id="h_154">Parameters</h5>
<table style="width:100%;">
<tr>
<th style="width:30%">Parameter</th>
<th>Description</th>
</tr>
<tr>
<td>0</td>
<td>The first expression to test</td>
</tr>
<tr>
<td>1</td>
<td>The second expression to test</td>
</tr>
</table>
</div>
</div>
<div class="section">
<h4 id="m_rewrite_">rewrite:</h4>
<p>Defines a new macro by rewriting (for more information, see <a href="/glyph/book/extending/interpreting.html#rewriting">Rewriting</a>)</p>
<strong>Aliases:</strong> <code>rw:</code>
<div class="example"><p>
<strong>Example</strong>
</p>
<pre class="lazy"><span class="line-numbers"> 1 </span> rw:[release|
<span class="line-numbers"> 2 </span> section[
<span class="line-numbers"> 3 </span> @title[Release {{0}}]
<span class="line-numbers"> 4 </span> {{1}}
<span class="line-numbers"> 5 </span> ]
<span class="line-numbers"> 6 </span> ]
</pre></div>
<div class="section">
<h5 id="h_156">Parameters</h5>
<table style="width:100%;">
<tr>
<th style="width:30%">Parameter</th>
<th>Description</th>
</tr>
<tr>
<td>0</td>
<td>The name of the new macro.</td>
</tr>
<tr>
<td>0</td>
<td>The macro definition (Glyph code).</td>
</tr>
</table>
</div>
<div class="section">
<h5 id="h_157">Remarks</h5>
<ul><li>The new macro can only be used <em>after</em> its declaration.</li>
<li>This macro cannot be used in <a href="/glyph/book/compiling/programmatic_usage.html#modes">safe mode</a>.</li></ul>
</div>
</div>
<div class="section">
<h4 id="m_ruby">ruby</h4>
<p>Evaluates its value as Ruby code within the context of the <a href="http://yardoc.org/docs/h3rald-glyph/Glyph">Glyph</a> module.</p>
<strong>Aliases:</strong> <code>%</code>
<div class="examples">
<p><strong>Examples:</strong></p>
<code>%[Time.now]</code><br /><code>%[Glyph::VERSION]</code><br />
</div>
<div class="section">
<h5 id="h_159">Parameters</h5>
<table style="width:100%;">
<tr>
<th style="width:30%">Parameter</th>
<th>Description</th>
</tr>
<tr>
<td>0</td>
<td>The Ruby code to evaluate.</td>
</tr>
</table>
</div>
<div class="section">
<h5 id="h_160">Remarks</h5>
<p>This macro cannot be used in <a href="/glyph/book/compiling/programmatic_usage.html#modes">safe mode</a>.</p>
</div>
</div>
<div class="section">
<h4 id="m_snippet">snippet</h4>
<p>Returns the value of a snippet.</p>
<strong>Aliases:</strong> <code>&</code>
<p><strong>Example:</strong> <code>&[glang]</code></p>
<div class="section">
<h5 id="h_162">Parameters</h5>
<table style="width:100%;">
<tr>
<th style="width:30%">Parameter</th>
<th>Description</th>
</tr>
<tr>
<td>0</td>
<td>The ID of the snippet to retrieve.</td>
</tr>
</table>
</div>
</div>
<div class="section">
<h4 id="m_snippet_">snippet:</h4>
<p>Defines a snippet.</p>
<strong>Aliases:</strong> <code>&:</code>
<p><strong>Example:</strong> <code>&:[test|This is a test]</code></p>
<div class="section">
<h5 id="h_164">Parameters</h5>
<table style="width:100%;">
<tr>
<th style="width:30%">Parameter</th>
<th>Description</th>
</tr>
<tr>
<td>0</td>
<td>The ID of the new snippet.</td>
</tr>
<tr>
<td>1</td>
<td>The contents of the new snippet.</td>
</tr>
</table>
</div>
<div class="section">
<h5 id="h_165">Remarks</h5>
<p>The new snippet can only be used <em>after</em> its declaration.</p>
</div>
</div>
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